G'day all.
Just found an excellent 1948 kinescope recording of Eye Witness "The Story Behind Television" on YouTube
http://www.youtube.com/watch?v=m-JDU6cdA_8 !!!
This episode towards the end features Vladmir Zworykin and his development of his television camera tubes from the iconoscope to the image orthicon and some of his tubes were displayed on the show and a couple of 16mm film telerecordings of his early experimental iconoscopes were featured!!!
On display were his prototype iconoscopes and the official 1850 iconoscope, a prototype orthicon tube and the official orthicon tube, the 3" image orthicon and a mini image orthicon tube!!!
Another thing I realize with this program is it was shot with iconoscope cameras instead of image orthicon cameras as there was the distinct iconoscope shading effects in the picture and there was no haloing on the highlights, it is extremely rare to find a kinescoped program shot with iconoscope cameras!
Anyhow enjoy the show!!!